Digital lighting process projection device

Abstract

A digital lighting process (DLP) projection device is provided. The DLP projection device includes a laser, a digital micromirror device (DMD), a projection lens, and a lens array. The laser emits laser light. The DMD receives the laser light emitted from the laser. The DMD includes a plurality of micromirrors arranged in an array, each of which reflects the laser light. The projection lens receives the laser light reflected from the micromirror, and projects the received laser light. The lens array is arranged between the laser and the DMD, and makes the laser light emitted from the laser uniform.

1 . A digital lighting process (DLP) projection device comprising:
 a laser configured to emit laser light;   a digital micromirror device (DMD) arranged at a predetermined angle to the laser, and configured to receive the laser light emitted from the laser, wherein the DMD comprises a plurality of micromirrors arranged in an array, each of which is configured to reflect the laser light;   a projection lens arranged at a predetermined angle to the DMD, and configured to receive the laser light reflected from the micromirror, and project the received laser light; and   a lens array arranged between the laser and the DMD, configured to make the laser light emitted from the laser uniform.   
     
     
         2 . The DLP projection device as described in  claim 1 , wherein the lens array comprises a transparent substrate, and a plurality of a truncated cones formed on the transparent substrate and towards to the DMD. 
     
     
         3 . The DLP projection device as described in  claim 2 , wherein a center axis of each of the plurality of truncated cones is parallel to the laser light emitted from the laser. 
     
     
         4 . The DLP projection device as described in  claim 2 , wherein a diameter of each of the plurality of truncated cones gradually increases from one end away from the transparent substrate to another end adjacent to the transparent substrate. 
     
     
         5 . The DLP projection device as described in  claim 1 , wherein the laser is a laser diode. 
     
     
         6 . The DLP projection device as described in  claim 1 , wherein the projection lens is a zoom lens. 
     
     
         7 . The DLP projection device as described in  claim 1 , wherein the projection lens is a prime lens. 
     
     
         8 . The DLP projection device as described in  claim 2 , wherein a diameter of a top surface of each of the plurality of truncated cones is more than 30 micron, and less than 50 micron. 
     
     
         9 . The DLP projection device as described in  claim 2 , wherein a diameter of a bottom surface of each of the plurality of truncated cones is more than 100 micron, and less than 200 micron. 
     
     
         10 . The DLP projection device as described in  claim 2 , wherein a height of each of the plurality truncated cones is more than 20 micron, and less than 100 micron. 
     
     
         11 . The DLP projection device as described in  claim 1 , wherein the lens array is made of optical material. 
     
     
         12 . The DLP projection device as described in  claim 2 , wherein the plurality of truncated cones and the transparent substrate are molded in one machine. 
     
     
         13 . The DLP projection device as described in  claim 2 , wherein the plurality of truncated cones and the transparent substrate are molded as two single machines and the truncated cones are affixed on the transparent substrate.